Hi All

My 1997 A4 Avant has some sort of big black plastic Nokia "box" in the rear offside boot compartment ( beneath where the CD player sits)

There is a mobile phone cradle on the passenger side of the centre console and some speaker looking things above the driver/passenger seats.
Any ideas on the following:

1/ How to change the current mobile phone cradle (looks like it is for an old Nokia phone) to a more up-to-date phone - e.g.6288

2/Whether this is even possible - can I just wire in a new cradle? How does the whole thing work?

3/ How to do it - I'm not technically advanced so an "idiot's guide" would be great

Any help would really be appreciated - tired of wearing my Bluetooth headset!

Many thanks